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    <meta name="viewport" content="width=device-width,height=device-height,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"/>
    <title>看！烟花！</title>

    <style>
        body{
            background-color:#000;
            margin:0;
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            cursor:crosshair;
            display:block;
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<body>
<canvas id="cav">
    fuck IE
</canvas>

<script src="js/boomFlower.js"></script>
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